<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./style.css">  
</head>
<script src="./style.css"></script>
<body>
    <form action="">
    <div class="box">
        <h2 class="title">用户登录</h2>
        <p class="box-name">用户名：</p>
        <p><input type="text" id="username" name="username"></p>
        <p class="box-name">密码：</p>
        <p><input type="password" id="password" name="password"></p>
        <button id="btn">登录</button>
    </div>
    </form>
    
    <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
    <script src="./style.css"></script>
</body>
</html>